Replaceable air filter

Details Replaceable air filter Replaceable air filter

1982-08-05

1986-04-15

Kemper, Catherine E.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Patent

active

D02834383

REFERENCES:
patent: D244538 (1977-05-01), Wharton et al.
patent: 2170207 (1939-08-01), Mosier et al.
patent: 3017698 (1962-01-01), Hambrecht et al.
patent: 3023839 (1962-03-01), Best
patent: 3076303 (1963-02-01), Durgeloh
patent: 3154393 (1964-10-01), Klein et al.
patent: 3774377 (1973-11-01), Bishop
patent: 4105423 (1978-08-01), Latakas
patent: 4277267 (1981-07-01), Posner
Handbook of Designs and Devices by Clarence P. Hornung, copyright 1932, p. 2, #14, Variant of the Circle, exr. room CP4-10A03.

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